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2‐D PIC Simulation on Space‐Charge Limited Emission Current from Plasma‐Facing Components
Author(s) -
Asano K.,
Ohno N.,
Ye M.Y.,
Fukuta S.,
Takamura S.
Publication year - 2000
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/1521-3986(200006)40:3/4<478::aid-ctpp478>3.0.co;2-2
Subject(s) - plasma , current (fluid) , space charge , insulator (electricity) , conductor , hot spot (computer programming) , physics , atomic physics , charge (physics) , materials science , computational physics , mechanics , electron , optoelectronics , nuclear physics , computer science , thermodynamics , composite material , quantum mechanics , operating system
Thermoelectrons emission from plasma facing components has been studied using 2‐D particle in cell simulation code (Berkeley code). The precise evaluation of the thermoelectrons emission current in plasmas is essential to study the plasma heat flow to the material surface, for example, the formation of the hot spot. It is found that the space‐charge limited current strongly depends on whether the periphery of the hot spot is insulator or conductor which is due to the modification of potential profiles in front of the plasma‐facing components.